Superposition theorem is valid only for
linear circuits

(ii) non-linear circuits

(iii) both linear and non-linear circuits
Neither of the two Maximum power transfer occurs at 100% efficiency

(ii) 50% efficiency

(iii) 25% efficiency
75% efficiency What is the phase angle of a series RLC circuit at resonance Zero

(ii) 90°

(iii) 45°
30° The differential equation of an electric current in a circuit containing resistance R and a capacitor C in series with the voltage source V is given by


(i) dV/dt =Ri /idt

(ii) dV/dt =Rdi/dt idt

(iii) dV/dt =Rdi/dt i/C

(iv) V di/dt The time constant of a series RL circuit is
LR

(ii) L/R

(iii) R/L
The transfer impedance is defined as the ratio of transform voltage to transform current at the same port

(ii) the ratio of transform voltage at one port to the transform current at the other port

(iii) Both and None of the above For a two-port bilateral network, the three transmission parameters are given by
A B and C What is the value of D?
1

(ii) 1/5

(iii) 7/5
11/5

2.(a) Find the current through the 30 Q resistor in the circuit shown in Figure 1 using nodal analysis method.
<img src='./qimages/11584-2a.jpg'> For the circuit shown in Figure determine the current in the branch AB by using Superposition theorem.
<img src='./qimages/11584-2b.jpg'>

3.(a) For the circuit shown in Figure determine the current thrQugh the resistance, inductance and capacitance for =10 e^-2t. Take R 1 ohm, L =0.1 and C =1uF. Use Laplace Transform method. <img src='./qimages/11584-3a.jpg'> For the parallel circuit shown in Figure R k.ohm, L 35 micro and C =450 micro.F. Find the resonance frequency, quality factor, lower and upper cut-off frequencies and bandwidth.
<img src='./qimages/11584-3b.jpg'>

4.(a) For the network shown in Figure determine the transfer functions G21(s) and Z21(s).
<img src='./qimages/11584-4a.jpg'> For the network shown in Figure find the driving point input impedance and plot the pole-zero pattern of the network.
<img src='./qimages/11584-4b.jpg'>

5.(a) Find the Y-parameters for the network shown in Figure 7.

<br><br> <img src='./qimages/11584-5a.jpg'> Obtain the transmission parameters of the circuit shown in Figure 8. Find whether the network is symmetrical or not.

<br><br> <img src='./qimages/11584-5b.jpg'>

6.(a) Design an m-derived low pass filter having cut-off frequency of 1 kHz, design impedance of 400 ohm and resonant frequency of 1100 Hz.

(b) Derive the expressions of characteristic impedance for symmetrical T-section

(ii) symmetrical ll-section.

7. Write short notes on any four of the following: Source transformation Impedance and selectivity in series resonance Four-terminal network and its classification Solution of RC circuit step response Time domain behaviour from pole-zero plot